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https://issues.apache.org/jira/browse/BEAM-8335?focusedWorklogId=358959&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-358959
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ASF GitHub Bot logged work on BEAM-8335:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 12/Dec/19 21:55
            Start Date: 12/Dec/19 21:55
    Worklog Time Spent: 10m 
      Work Description: KevinGG commented on pull request #10368: [BEAM-8335] 
Modify PipelineInstrument to add TestStream for unbounded PCollections
URL: https://github.com/apache/beam/pull/10368#discussion_r357390978
 
 

 ##########
 File path: sdks/python/apache_beam/runners/interactive/pipeline_instrument.py
 ##########
 @@ -375,12 +377,15 @@ def _read_cache(self, pipeline, pcoll):
     # Can only read from cache when the cache with expected key exists.
     if self._cache_manager.exists('full', key):
       if key not in self._cached_pcoll_read:
+        if pcoll.is_bounded:
+          read_transform = cache.ReadCache(self._cache_manager, key)
+        else:
+          read_transform = streaming_cache.StreamingCacheReceiver()
 
 Review comment:
   This boundedness is implemented 4 months ago in this PR: 
https://github.com/apache/beam/commit/79d4bf28c78ba8b7e9a0d01f6c86db79868312b9
   Before, Python SDK doesn't care about the boundedness of pvalue instances.
   
   It simply checks the boundedness of io source and pass along the 
information: 
https://github.com/apache/beam/commit/79d4bf28c78ba8b7e9a0d01f6c86db79868312b9#diff-5bdf3a832591550d5839cb5f76ea2f10R884
   
   So it cannot be source of truth for checking PCollection boundedness.
   
   This can be another motivation for us to unify the 2 caching managers.
   
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 358959)
    Time Spent: 44h 40m  (was: 44.5h)

> Add streaming support to Interactive Beam
> -----------------------------------------
>
>                 Key: BEAM-8335
>                 URL: https://issues.apache.org/jira/browse/BEAM-8335
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-py-interactive
>            Reporter: Sam Rohde
>            Assignee: Sam Rohde
>            Priority: Major
>          Time Spent: 44h 40m
>  Remaining Estimate: 0h
>
> This issue tracks the work items to introduce streaming support to the 
> Interactive Beam experience. This will allow users to:
>  * Write and run a streaming job in IPython
>  * Automatically cache records from unbounded sources
>  * Add a replay experience that replays all cached records to simulate the 
> original pipeline execution
>  * Add controls to play/pause/stop/step individual elements from the cached 
> records
>  * Add ability to inspect/visualize unbounded PCollections



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